. Bulletin. 1901-13. Agriculture; Agriculture. S7S s/o 3/3 Pig. 4.—Wheat centgenerof 100 plants, showing variations in yield of prain and of nitrogen in 1907. I'pper figures, percentage of nitrogen content; middle figures, number of kernels produced: lower figures, weight of goo<l kernels in grams. The various underscorings of the ujjper figures indicate five groups having successively higher nitrogen content as follows: (1) Figures underscored wit \\ two straight lines lie between and per cent; (2) those uiulerscored with one straight line li
. Bulletin. 1901-13. Agriculture; Agriculture. S7S s/o 3/3 Pig. 4.—Wheat centgenerof 100 plants, showing variations in yield of prain and of nitrogen in 1907. I'pper figures, percentage of nitrogen content; middle figures, number of kernels produced: lower figures, weight of goo<l kernels in grams. The various underscorings of the ujjper figures indicate five groups having successively higher nitrogen content as follows: (1) Figures underscored wit \\ two straight lines lie between and per cent; (2) those uiulerscored with one straight line lie i^etween and per cent; (3) those not underscored lie between ')fi and 2.,')9 per cent; (4) those underscored with one wave line lie between and .'{ per cent; (.')) those underscored with two wave lines lie above .S per cent. nitrogen content of phints in a family, as there always seemed to be a mean content for each family, to which the types n^turned. As examples of variution, note that No. 35809 in family 42 lias a low yield of nitrogen, yet the yiehl of nitrogen found in its progeny is ])ractically equal to that of other members of the family. In family 4S (Table IV) note that in 190:^ the thnv plants selected analyzed :^.S2, , and ])er cent of nitrogen, respectively, 209. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
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